This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

1z8q

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 07:23, 10 September 2015

Ferrous dioxygen complex of the A245T cytochrome P450eryF

Structural highlights

1z8q is a 1 chain structure with sequence from "actinomyces_erythreus"_(sic)_waksman_1923 "actinomyces erythreus" (sic) waksman 1923. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Related:	1z8o, 1z8p
Gene:	eryF, CYP107A1 ("Actinomyces erythreus" (sic) Waksman 1923)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[CPXJ_SACEN] Catalyzes the NADPH-dependent conversion of 6-deoxyerythronolide B (6-DEB) to erythronolide B (EB) by the insertion of an oxygen at the 6S position of 6-DEB. Requires the participation of a ferredoxin and a ferredoxin reductase for the transfer of electrons from NADPH to the monooxygenase.^[1] ^[2]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Cytochrome P450eryF (CYP107A) from Saccaropolyspora ertherea catalyzes the hydroxylation of 6-deoxyerythronolide B, one of the early steps in the biosynthesis of erythromycin. P450eryF has an alanine rather than the conserved threonine that participates in the activation of dioxygen (O(2)) in most other P450s. The initial structure of P450eryF (Cupp-Vickery, J. R., Han, O., Hutchinson, C. R., and Poulos, T. L. (1996) Nat. Struct. Biol. 3, 632-637) suggests that the substrate 5-OH replaces the missing threonine OH group and holds a key active site water molecule in position to donate protons to the iron-linked dioxygen, a critical step for the monooxygenase reaction. To probe the proton delivery system in P450eryF, we have solved crystal structures of ferrous wild-type and mutant (Fe(2+)) dioxygen-bound complexes. The catalytic water molecule that was postulated to provide protons to dioxygen is absent, although the substrate 5-OH group donates a hydrogen bond to the iron-linked dioxygen. The hydrogen bond network observed in the wild-type ferrous dioxygen complex, water 63-Glu(360)-Ser(246)-water 53-Ala(241) carbonyl in the I-helix cleft, is proposed as the proton transfer pathway. Consistent with this view, the hydrogen bond network in the O(2).A245S and O(2) .A245T mutants, which have decreased or no enzyme activity, was perturbed or disrupted, respectively. The mutant Thr(245) side chain also perturbs the hydrogen bond between the substrate 5-OH and dioxygen ligand. Contrary to the previously proposed mechanism, these results support the direct involvement of the substrate in O(2) activation but raise questions on the role water plays as a direct proton donor to the iron-linked dioxygen.

Crystal structures of the ferrous dioxygen complex of wild-type cytochrome P450eryF and its mutants, A245S and A245T: investigation of the proton transfer system in P450eryF.,Nagano S, Cupp-Vickery JR, Poulos TL J Biol Chem. 2005 Jun 10;280(23):22102-7. Epub 2005 Apr 11. PMID:15824115^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Andersen JF, Hutchinson CR. Characterization of Saccharopolyspora erythraea cytochrome P-450 genes and enzymes, including 6-deoxyerythronolide B hydroxylase. J Bacteriol. 1992 Feb;174(3):725-35. PMID:1732208
↑ Weber JM, Leung JO, Swanson SJ, Idler KB, McAlpine JB. An erythromycin derivative produced by targeted gene disruption in Saccharopolyspora erythraea. Science. 1991 Apr 5;252(5002):114-7. PMID:2011746
↑ Nagano S, Cupp-Vickery JR, Poulos TL. Crystal structures of the ferrous dioxygen complex of wild-type cytochrome P450eryF and its mutants, A245S and A245T: investigation of the proton transfer system in P450eryF. J Biol Chem. 2005 Jun 10;280(23):22102-7. Epub 2005 Apr 11. PMID:15824115 doi:http://dx.doi.org/10.1074/jbc.M501732200

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1z8q"

@@ Line 2: / Line 2: @@
 <StructureSection load='1z8q' size='340' side='right' caption='[[1z8q]], [[Resolution|resolution]] 2.00&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1z8q]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Saccharopolyspora_erythraea Saccharopolyspora erythraea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Z8Q OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1Z8Q FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1z8q]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"actinomyces_erythreus"_(sic)_waksman_1923 "actinomyces erythreus" (sic) waksman 1923]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Z8Q OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1Z8Q FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=DEB:6-DEOXYERYTHRONOLIDE+B'>DEB</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=OXY:OXYGEN+MOLECULE'>OXY</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1z8o|1z8o]], [[1z8p|1z8p]]</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">eryF, CYP107A1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1836 Saccharopolyspora erythraea])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">eryF, CYP107A1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1836 "Actinomyces erythreus" (sic) Waksman 1923])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1z8q FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1z8q OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1z8q RCSB], [http://www.ebi.ac.uk/pdbsum/1z8q PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1z8q FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1z8q OCA], [http://pdbe.org/1z8q PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1z8q RCSB], [http://www.ebi.ac.uk/pdbsum/1z8q PDBsum]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/CPXJ_SACER CPXJ_SACER]] Conversion of 6-deoxyerythronolide B (6-DEB) to erythronolide B (EB) by the insertion of an oxygen at the 6S position of 6-DEB.
+[[http://www.uniprot.org/uniprot/CPXJ_SACEN CPXJ_SACEN]] Catalyzes the NADPH-dependent conversion of 6-deoxyerythronolide B (6-DEB) to erythronolide B (EB) by the insertion of an oxygen at the 6S position of 6-DEB. Requires the participation of a ferredoxin and a ferredoxin reductase for the transfer of electrons from NADPH to the monooxygenase.<ref>PMID:1732208</ref> <ref>PMID:2011746</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 28: / Line 28: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1z8q" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Saccharopolyspora erythraea]]
 [[Category: Cupp-Vickery, J R]]
 [[Category: Nagano, S]]

1z8q

From Proteopedia

Revision as of 07:23, 10 September 2015

Ferrous dioxygen complex of the A245T cytochrome P450eryF

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox